Electric-arc lamp.



No. 674,642. Patented lay 2|, 19m.

R. E. BALL. ELECTRIC ARQLAMP.

(Applicstion flied Apr. 11, 1900.; (No Iodel.) 4 Sheets-Sheet l.

WXTNESSES:

INVENTOR 35 ATTORNEYS "m: walls versus w. PMC7044110, wunmcn'on. 04 c,

Ptented May 2|, I90l.

4 Sheets-Sheet 2.

R. E. BALL.

ELECTRIC ABC LAMP.

(No Model. (Avrlmon med A 11 19 ATTORNEYS.

ER :0. mo 0.. WASMINGYON u r No. 674,642. Patented my 2|,1901.

n. 5. BALL. ELECTRIC ARC LAMP.

(Application filed. Apr. 11, 1900.) (No llodel.) 4 Sheets-Sheet 3.

rm: m m ca. mommna, wasnmu'rom o. c.

Patented May 2| l90l.

4Sheets-Shegt 4.

R. E. BALL. ELECTRIC ARC LIMP.

(Apphcltmn med Apr 11 1900 (No ludal.) I

WITNESSES:

W t 3 M f 4 on F u M H UNITED STATES PATENT OFFICE.

ROYAL E. BALL, OF'NEW YORK, N. Y., ASSIGNOR TO THE BALL ELECTRICCOMPANY, OF YONKERS, NEW YORK.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent N 0. 674,642, dated May 21,1901.

Application filed April 11, 1900.

To aZZ whont it may concern.-

Be it known that I, ROYAL E. BALL, a citizen of the United States,residing at New York city, borough of Manhattan, county and State of New.York, have invented certain new and useful Improvements in Electric-ArcLamps, of which the following is such a full,

clear, and exact description as will enable any one skilled in'the artto which it appertains to IO make and use the same, reference being hadto the accompanying drawings, forming part of this specification.

My invention relates to improvements in severaldiiferentparts of anelectric-arc lamp;

(5 and my improvements consist in the various novel and peculiararrangements and combinations of the several parts of the apparatus, allas hereinafter fully-described and then pointed out in the claims. 7

I have illustrated types of my various inventions in the accompanyingdrawings, wherein g V Figure 1 is asection of myimproved lamp, the planeof the section being taken on a verzs tical plane extending centrallythrough the lamp, as indicated by line 1 1, Fig. 2. In this view aportion ofthe arc-inclosing globe is broken away, the telescoping casingis raised in open position, and the outer globe 0 and its holder areomitted. Fig. 2 is an enlarged horizontal section taken at a point justabove the tilting frame of the feed-regulating mechanism. Fig. 3 is anenlarged vertical section of the lower guide for the upper carbon,together with a portion of the fixed plate in which the guide ismounted. Fig. 4 is an enlarged side view of the lower portion of thelamp with the vertically adjustable outer globe and its holder omitted.Fig. 5 is an enlarged vertical sectional view of the lower carbon, theinclosing globe, and the combined carbon-holder and globe-holder. Fig. 6is an enlarged view of the combined arc-inclosingglobe holder andcarbon-holder, the three 5 parts constituting this device being detachedfrom each other. Figs. 7 and 8 are side views of my improved lamp,showing the verticallyadjustable globe with its holder in closed and inopen position, respectively. In these two views the combined globe andlower-carbon holder is omitted. Fig. 9 is an enlarged plan Serial No.12,393. (No model- View of one of the adjustable friction-clutches,shown as detached. Fig. 10 is a side view of a portion of the lamp-framerod and one of the frictionclutches mounted thereon, the clutch beingshown partly in vertical section. In this view the clutch shown in fulllines indicates the closed position thereof, while the dotted lineindicates the open position of the clutch. Referring to the drawings, inwhich like numbers of reference designate like parts throughout, 2 and 3are the upper and lower 7 plates, respectively, of the lamp-frame, and 4is a casing surrounding the plates, so as to inclose the feed-regulatingmechanism for the carbon. I

5 is themain magnet.

' 6 is the shunt which controls the verticallymovable core 7, and 8 is atilting frame carrying the gearing of the feed-regulating mechanism, thetilting frame being pivoted at 9 and loosely connected at 10 to the core7, so as to be actuated in the manner well known.

11 is the carbon-rod, the vertical movements ofwhich are controlled bythe regulating mechanism, and 12 is the upper carbon carried by suchrod.

A fixed tubular casing 13 depends from the under side of the lower plate3, from which it is completely insulated by a layer of suitable material14, such as asbestos. This fixed casing 13 has mounted within it atelescoping section 15, the lower end of which is flared outwardly andfits over an annular flange 16, formed upon the upper surface of thebase-plate 17 of the lamp. This telescoping casing completely houses thepart of the carbon-rod and the upper carbon which lies between the lowerplate 3 and the base-plate 17. It also, when closed, serves to cover thelower guide and the surrounding parts, so that all such parts areprotected against the weather and against the admission thereto offoreign matter. The upper part of the fixed portion of the telescopingcasing 13 is provided with ventilating-openings 18 to permit the heatedair which may enter the casing to escape, and thus be-prevented fromreaching the working parts of the lamp, which are located above. When itis desired to gain access to the upper carbon to replace it or forany-other reason, the telescoping casing is raised into the full-lineposition shown in other guide, which indirectly acts upon thecarbon-rod, is a peculiar form of device which cooperates with the uppercarbon, as will now be described.

The base-plate'17 of the lamp is formed with a centrally-locatedcircular opening 23, and 24 is a fixed bracket depending from the underside of the base-plate 17, from which it is insulated by a layer ofasbestos 25. This bracket 24 is designed to carry the lower-carbonholder and the inner globe 26 which incloses the arc. The upper part ofthe bracket 24 is formed with a circular opening 27, the walls of whichopening'are straight or vertical, as shown more particularly in theenlarged view in Fig. 3. The lower guide, which takes within the opening27, is composed of a com paratively thick and heavy disk 28, having acylindrical central opening 29 of a diameter considerably larger thanthe diameter ofthe carbon l2,which passes through it. This disk 28,which I prefer to make of soapstone, has its periphery 30formed like thesection of a sphere, and its diameter is such that it fits nicely withinthe cylindrical opening 27 of the fixed piece 24. (See Fig. This disk28, in addition to providing a guide for the upper carbon, serves as acap for the upperend of the inner globe 26, and its weight keeps itseated firmly on the globe. If the upper end of the inner globe shouldnot be perfectly level, the

disk 28 readily accommodates itself to the inclination by reason of itsrounded periphery 30, which permits the disk to'tilt readily in anydirection out of the horizontal.

plate overhangs the edges of the disk and will rest upon the fixed piece24 when the disk is not supported from below by the inner globe. Thisretaining-plate 31 is formed with a central opening 32 considerablylarger than the diameter of the carbon passing through it, and it issecured to the disk by a set of screws 33, which pass through the bodyof the disk and take into an annular plate 34 on the under side thereofto secure the screws in place. This annular plate 34 is made of adiameter slightly smaller than the inner diameter of the inner globe26,so that it fits-within the mouth of the globe, as shown in Fig. 1.

'terial fits snugly around thecarbon and serves as a guide therefor. Inthe present construction I place this guide 35, which is a piece ofasbestos, between the retaining-plate 3 1 and the upper face of the disk28, so that it is clamped firmly in place. By virtue of having theflexible guide 35, which fits snugly around the carbon, of a smallerdiameter than the opening 29 in the disk either the disk can be tiltedout of the horizontal without disturbing the vertical position of thecarbon or the carbon itself can swing or move laterally withoutbeing'obstructed by the disk, as under'such movement the soft materialof the guide 35 will readily yield, This asbestos guide 35 acts also asa seal for preventing the heat from the are reaching the upper'part ofthe lamp, which is an advantage, because in many lamps the heat fromthearc has such directaccess to the working parts thereof as to impair thesame. The fixed bracket 24, depending from the base-plate 17, extendsdownwardly a considerable distance and at its lower end is formed with ahorizontal arm ally and into which projects a set-screw 38. (See Figs. land 4.) This socket in the bracket'is designed to receive my improvedcombined carbon and globe holder-,which comprises a cylindrical tubularmember 39, the bore 40 of which is conical or tapering,

withthe larger end of thetaper uppermost,

so that the cylindrical lower carbon :41 may be wedged'within theholder, as shown in Fig. 5.. The upper end of the bore 40 is fo'rmedwitha bushing or-shoulder 42, having cylindrical walls and of a diameterequal to that of the lower carbon, so that the car bon when inserted inthe holder is maintained in axial alinement with the bore thereof. Thisconstruction insures the perfect centering of the carbon in the holder,and at the same time the carbon may be forced .in firmly in the taper ofthe holder without using any care as to centering it. This feature ofthe conical receiving-socket for the carbon, combined with the internalshoulder or bushing 42,con1pensates for the ordinary irregularitiesfound in the surface of the carbons, so that .provided with a socket 37,which opens laterthe carbon will assume a vertical position nut 45,which cooperates therewith, are so proportioned that the flange lieswithin the globe 26, while the nut 45 engages the exterior thereof. Inthe present construction the upper w face of the nut 45 is made flat, sothat it abuts against the ground end of the globe. 26, as shown in Fig.5. By this arrangement the globe may be clamped between the flange 43and the nut 45 by screwing up the latter. However, I prefer to interposebetween the engaging face of the flange and the interior of the globe asuitable packing or a washer 46 of soft material, which I preferablymake of asbestos; This soft washer permits of the globe being clampedtightly between the two members without the liability of breaking theglobe, and, furthermore, it makes a more perfect inclosure, as itaffords a better seal than rigid material.

28 rest with its own weight upon the upper end of the globe, whereuponthe set screw 38 is turned down to clamp the holder in the socket. Indismounting the holder from the bracket the set-screw 38 is unscrewedand the holder is lifted out 'through'the open side of the socket 37. rI

The outer globe 47 for covering the light depends from the lower part ofthe lamp, being held at its upper end by a suitable holder 48. Thisholder is vertically adjustable, so that by raising it the outer globemay be carried up against the under side of the base-plate 17,

so as to cover the light, as shown in Fig. 7, while lowering the holdercauses the globe to descendto a position below the light, as shown inFig. 8, and in this latter positionfull access is given to the innerglobe and carbon holder for the replacement of the carbons. There aremany well-known ways in which this outer globe may be verticallyadjusted so as to open and close it; but I show only one way, whichconsists in two friction-clutches 49 and 50, each of which is formedwith a circular opening 51 for receiving the vertical rods 52 and 53,respectively, ofthe lamp.- frame. The opening 51 in each of the clutchesis somewhat larger than the frame-rod which passes through it, so thatthe clutch may be tilted relatively to the rod in order to cause it tobind upon the rod and to release it. The friction-clutch 49 is connectedwith the holder 48 by a flexible connection or chain 54, while theclutch 50 is likewise connected bya chain 55. By raising the outer endof each of the clutches they are caused to unclutch the rod and may thenbe moved up or down along the rods, according to whether the outer globeis to be closed or opened. This construction of thevertically-adjustable means for the outer globe-holder affords a verysimple and safe means for accomplishing the purpose for which it isdesigned, and the specific means, as shown, cannot accidentally becomedetached from the lamp without some part thereof breaking, since theclutches themselves are confined to the lamp-rods 52 and 53 against anyaccidental detachment therefrom. By using a piece of stone, such assoapstone, for the body of the disk 28 I secure a certain .desirableweight for the disk, so that it keeps itself firmly seated upon theupper end of the inclosing globe, and at the same time it providesinsulation at this point.

I Wish to be understood as not limiting my improvements to the specificforms of construction herewith shown, as various modifications may bemade in the same without departing from the spirit of the invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The combination of a carbon-rod of an electric-arc lamp,feed-regulating mechanism loosely engaging the said carbon-rod, a guidefor said carbon-rod pivoted to a moving part of the feed-regulatingmechanism and engaging the carbon-rod at a single point, whereby thecarbon-rod is free to swing on the pivot of said guide, substantially asand for the purpose set forth.

2. The combination of a carbon-rod of an electric-arc lamp,feed-regulating mechanisn engaging said carbon-rod, a guide pivoted on amoving partof the feed-regulating mechanism and engaging the carbon-rodat a single point and practically where it is engaged by the saidfeed-regulating mechanism,whereby the carbon-rod isfree to swing on thepivot of said guide, substantially as and for the purpose set forth.

3. The combination of a carbon-rod and a tilting feed-regulatingmechanism therefor, a

mounted as to be freely tipped in any direction at an angle to thevertical, substantially as and for the purpose set forth.

6. A movable guide for the upper carbon, the same comprising ahorizontal disk having a central perforation for the carbon to passthrough, the periphery of said disk being formed like a section of asphere, a fixed plate having a circular opening with a diameter equal tothe diameter of the said disk, and

means for retaining the disk within the circular opening at the sametime permitting a IIO free rocking movement therein, substantially asand for the purpose set forth.

7. A movable guide for a carbon, the same consisting in a horizontaldisk provided with a central opening for the carbon to pass through andmounted so as to tilt in all directions about its vertical axis, theopening in said disk being provided with a soft material for surroundingand engaging the carbon,

substantially as and for the purpose set forth. 8. A movable guide for acarbon, the same comprising a disk having the body thereof formed ofrigid material provided with a central opening having a larger diameterthan the carbon, a piece of flexible material mounted upon said disk andprovided with an opening smaller than and concentric with the opening insaid disk and adapted to receive the carbon, the 1 said disk beinghorizontally mounted so as to tilt in all directions about.

its vertical .axis, substantially as and for the purpose set forth.

9. A movable guide for-a carbon, the same comprising a fixed platehaving a circular opening, a disk of rigid material formed with acentral opening for the carbonand having its periphery formed like thesection of a sphere and of .a diameter slightly less than thediameter ofthe opening in said fixed plate,

a retaining device'for preventing the disk from dropping through the.opening in the said fixed plate, substantially as and for'the purposeset forth.

10. A movable guide for a carbon,-the same comprising a fixed platehaving a cylindrical opening, a disk provided with a circular openingfor the carbon and having its periphery formed like the section of asphere, the diameter of the disk being slightly less than that of thecylindrical opening in said plate,

and means for retaining the disk in the cylindrical opening at the sametime permitting it to rock in all directions about its vertical axis,substantially as and for the purpose set forth.

11. A movable guidefor a carbon, the same comprising a fixed platehaving a circular opening, a disk of rigid material provided with acentral opening for the carbon, the

said disk having a diameter slightly less than that of the circularopening in the plate so as to fit loosely therein, a plate secured tothe upper side of said disk and of a considerablylarger diameter thanthe opening in said plate, a layer of flexible material interposedbetween the upper face of the disk and the plate secured thereto, thesaid flexible material being formed with an opening smaller,

than, but concentric with, the opening in said disk, substantially asand for the purpose set forth.

12. The combination of a carbon-rod and carbon of an electric-arc lamp,an arc-inclosing globe, a tilting horizontal guidedisk mounted so as totilt in all directions about its vertical axis and through which saidcarbon loosely passes, said guide-disk adapted to rest loosely uponthe'upper end of said globe and closing the same, substantially as andfor the purpose set forth;

13. A combined carbon-holder and globe holder consisting in thecombination of an externally-threaded tubular member, the

socket of which is adapted to receive and hold the carbon, the saidtubular member being formed near its upper end with an external flangelying within the globe, a nut mounted upon the thread of said tubularmember and adapted to engage with its upper face the end of the globe,and a soft washerinterposed between said flange and the interior of theglobe, wherebythe tightening of the nut exerts an endwise pressure ontheglobe, clamp ing it between the nut and the soft washer,substantially as and forthe purpose set forth.

14. A tubular carbon-holder for an electric-.

arc lamp havinga taperingsocket for receiving the carbon, substantiallyas and forthe purpose set forth. v

' 15. Atubular carbon-holder for an electric- .ai-c lamp having'atapering socket formed at the receiving end of the taper with aninternal shoulder, substantially as and for the purpose set forth.

16. The combination of a lam p,'a fixed piece and avertically-adjustable globe-holder adapted to seat itself against theunder side. .of said fixed piece for'suspending the globe,

one or more rods extending above said'fixed piece,'and flexibleconnections having their lower ends attachedto said globe-holder andtheir upperends provided with clutches traveling on and engagin gsaidrods, substantially as and. for the purpose set forth.

17. The combination of a lamp, one or more rods, a fixed piece" and aglobe-holder adapted to rest against said fixed piece, apclutch,mountedon each of said rods and vertically adjustable along the same,said clutch comprising a movable memberprovided with an opening slightlylargerthan thesaid rod which extends through the openingso thatdepressing one end of said clutch member causes the same to clutchthBxI'Od while the raising of said end of the clutch member, unclutchessaid member from the rod, and chain connections between each of the saidclutch members and the globe-holder, substantially as and for thepurpose set forth.

18. The combination of an upright fixture for a light, avertically-adjustable globeholder and a fixed piece against the underside of which the globe-holder is adapted to rest,

a set of vertically-adjustable'flexible connections attached by theirlower ends to said globe-holder and adj ustably attached by their upperends to the upper portion of'the fix- -ture, substantially as and forthe purpose set forth. 1 I

' 19. The combination of the lower-carbon holder, adepending bracketprovided with a horizontal extension having a lateral opening forreceiving the carbon-holder, and a setscrew taking into said opening forengaging 674,642 r i I 5 said carbon-holder to clamp it in place, sublto rest upon the upper end of said globe, substantially as and for thepurpose set forth. stantially as and for the purpose set forth.

20. The combination of a carbon-rod and a In testimony whereof I havehereunto set tilting feed-regulating mechanism therefor, my hand in thepresence of the two subscrib- 5 a guide for said carbon-rod pivoted tothe ing Witnesses.

tilting mechanism, an arc-inclosing globe, a combined cap andcarbon-guide comprising a disk having a central perforation, said diskWitnesses: being mounted horizontally so as to tilt in all SAMUEL M.OHESNUT, :0 directions about its vertical axis and adapted WILLISFOWLER.

ROYAL E. BALL.

